title: Pyrrolizidine alkaloids from Onosma erecta.
abstract: The MeOH extract of the aerial parts of Onosma erecta afforded four new pyrrolizidine alkaloids, 7-O-acetylechinatine N-oxide (1), a viridinatine N-oxide stereoisomer (2), 7-epi-echimiplatine N-oxide (3), and onosmerectine N-oxide (4), and two additional new natural products, the acid 2,3-dimethyl-2,3,4-trihydroxypentanoic acid (5) and the acyloin 4-methyl-2-hydroxypentanone (6).
authors.affiliation: Department of Pharmacognosy, Faculty of Pharmacy, University of Athens, University Campus of Zografou , 15771 Zografou, Athens, Greece.
authors.forename: Harilaos
authors.initials: H
authors.lastname: Damianakos
authors.forename: Georgios
authors.initials: G
authors.lastname: Sotiroudis
authors.forename: Ioanna
authors.initials: I
authors.lastname: Chinou
mesh_terms: D028082:Boraginaceae / Q000737:chemistry*; D002851:Chromatography, High Pressure Liquid; D006115:Greece; D006801:Humans; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D011763:Pyrrolizidine Alkaloids / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: D011763:Pyrrolizidine Alkaloids